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variable sample rate

AnonymousContent
Expert 4605 points

hello!

is it possible to change sample rate of ADC while sampling ?

i want to control sample rate when AIC23 Codec write input data.in some part of audio i need to increase  or decrease frequency.

thanks!

  • 0
    TI__Mastermind 28585 points

    The sample rate will change as quickly as you can write to the register so you should be able to change the sample rate on the order of 40 us. Of course then you would have to flush the modulator in order to insure that there were no audio artifacts. Depending on the digital filter you are using, this could be up to 20 samples (see table 3-1).

     

    i would recommend:

     

    1) Mute the DAC

    2) deactivate the digital interface

    3) change the sample rate

    4) reactivate the digital interface

    5) wait the appropriate number of samples per table 3-1

    6) unmute the DAC